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- - New to old trucks (https://67-72chevytrucks.com/vboard/showthread.php?t=548580)

fish on

10-21-2012 11:08 PM

New to old trucks

I just purchased a 1987 chevy V20 4x4 and i was wondering how to tell what kind of transmission it has? I believe it is a 350t because it is a three speed. Any help would be appreciated.

Thanks, Phil

frog210

10-21-2012 11:12 PM

Re: New to old trucks

look at the transmission pan
and compare to these in this link
350
400
700r4
http://www.lmctruck.com/icatalog/cc/full.aspx?Page=101

fish on

10-21-2012 11:14 PM

Re: New to old trucks

Thanks frog

J Knight

10-21-2012 11:40 PM

Re: New to old trucks

I would bet its a TH400 being a 3spd 20series.

Your41Plague12

10-22-2012 12:23 AM

Re: New to old trucks

Especially in 87. They quit using the TH350 some time in the early 80's IIRC. Look at your gas pedal bracket; is there an electrical switch with two wires coming off of it, one pink and one orange? If so, that is the kickdown switch for a TH400. That is the factory setup.

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